<template>
  <div class="login weather-login">
    <div class="weather-bg-overlay"></div>
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form weather-login-form">
      <div class="login-header">
        <svg-icon icon-class="chart" class="system-icon" />
        <h3 class="title">天气分析预测系统</h3>
        <p class="subtitle">专业的气象数据分析与预测平台</p>
      </div>
      <el-form-item prop="username">
        <el-input
          v-model="loginForm.username"
          type="text"
          auto-complete="off"
          placeholder="账号"
        >
          <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="loginForm.password"
          type="password"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter.native="handleLogin"
        >
          <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input
          v-model="loginForm.code"
          auto-complete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter.native="handleLogin"
        >
          <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
        </el-input>
        <div class="login-code">
          <img :src="codeUrl" @click="getCode" class="login-code-img"/>
        </div>
      </el-form-item>
      <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="medium"
          type="primary"
          style="width:100%;"
          @click.native.prevent="handleLogin"
        >
          <span v-if="!loading">登 录</span>
          <span v-else>登 录 中...</span>
        </el-button>
        <div style="float: right;" v-if="register">
          <router-link class="link-type" :to="'/register'">立即注册</router-link>
        </div>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-login-footer weather-footer">
      <span>Copyright © 2025 天气分析预测系统 版权所有</span>
    </div>
  </div>
</template>

<script>
import { getCodeImg } from "@/api/login"
import Cookies from "js-cookie"
import { encrypt, decrypt } from '@/utils/jsencrypt'

export default {
  name: "Login",
  data() {
    return {
      codeUrl: "",
      loginForm: {
        username: "admin",
        password: "admin123",
        rememberMe: false,
        code: "",
        uuid: ""
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", message: "请输入您的账号" }
        ],
        password: [
          { required: true, trigger: "blur", message: "请输入您的密码" }
        ],
        code: [{ required: true, trigger: "change", message: "请输入验证码" }]
      },
      loading: false,
      // 验证码开关
      captchaEnabled: true,
      // 注册开关
      register: false,
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  created() {
    this.getCode()
    this.getCookie()
  },
  methods: {
    getCode() {
      getCodeImg().then(res => {
        this.captchaEnabled = res.captchaEnabled === undefined ? true : res.captchaEnabled
        if (this.captchaEnabled) {
          this.codeUrl = "data:image/gif;base64," + res.img
          this.loginForm.uuid = res.uuid
        }
      })
    },
    getCookie() {
      const username = Cookies.get("username")
      const password = Cookies.get("password")
      const rememberMe = Cookies.get('rememberMe')
      this.loginForm = {
        username: username === undefined ? this.loginForm.username : username,
        password: password === undefined ? this.loginForm.password : decrypt(password),
        rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
      }
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          if (this.loginForm.rememberMe) {
            Cookies.set("username", this.loginForm.username, { expires: 30 })
            Cookies.set("password", encrypt(this.loginForm.password), { expires: 30 })
            Cookies.set('rememberMe', this.loginForm.rememberMe, { expires: 30 })
          } else {
            Cookies.remove("username")
            Cookies.remove("password")
            Cookies.remove('rememberMe')
          }
          this.$store.dispatch("Login", this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || "/" }).catch(()=>{})
          }).catch(() => {
            this.loading = false
            if (this.captchaEnabled) {
              this.getCode()
            }
          })
        }
      })
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss">
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-size: cover;
  position: relative;
  overflow: hidden;
}

/* 天气预测系统专用样式 */
.weather-login {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  /* 使用渐变背景替代图片，更符合数据分析主题 */
}

.weather-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 50%);
}

.login-header {
  text-align: center;
  margin-bottom: 30px;
}

.system-icon {
  font-size: 48px;
  color: #409EFF;
  margin-bottom: 15px;
}

.title {
  margin: 0px auto 10px auto;
  text-align: center;
  color: #409EFF;
  font-size: 24px;
  font-weight: bold;
}

.subtitle {
  margin: 0px auto 20px auto;
  text-align: center;
  color: #606266;
  font-size: 14px;
}

.weather-login-form {
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.95);
  width: 420px;
  padding: 40px 35px 30px 35px;
  z-index: 1;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  
  &:hover {
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
  }
  
  .el-input {
    height: 42px;
    input {
      height: 42px;
      border-radius: 6px;
      border-color: #e0e0e0;
      transition: all 0.3s;
      
      &:focus {
        border-color: #409EFF;
        box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.1);
      }
    }
  }
  
  .input-icon {
    height: 42px;
    width: 16px;
    margin-left: 2px;
    color: #909399;
  }
  
  .el-button--primary {
    height: 42px;
    border-radius: 6px;
    background-color: #409EFF;
    border-color: #409EFF;
    font-size: 16px;
    transition: all 0.3s;
    
    &:hover {
      background-color: #66b1ff;
      border-color: #66b1ff;
    }
    
    &:focus {
      background-color: #3a8ee6;
      border-color: #3a8ee6;
    }
  }
  
  .el-checkbox__label {
    color: #606266;
  }
}

/* 原有样式保留 */
.login-form {
  .el-input {
    height: 38px;
    input {
      height: 38px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.login-code {
  width: 33%;
  height: 38px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}

.weather-footer {
  color: rgba(255, 255, 255, 0.8);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
  .weather-login-form {
    width: 90%;
    max-width: 400px;
    padding: 30px 25px 25px 25px;
  }
  
  .title {
    font-size: 20px;
  }
  
  .subtitle {
    font-size: 12px;
  }
  
  .system-icon {
    font-size: 40px;
  }
}
.login-code-img {
  height: 38px;
}
</style>
